Crystal structure of ilyukhinite, a new mineral of the eudialyte group

Journal Article · Sun Jan 15 04:00:00 EST 2017 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774517010199· OSTI ID:22645263

Rozenberg, K. A. ^[1]; Chukanov, N. V. ^[2]; Aksenov, S. M. ^[1]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography, Crystallography and Photonics Federal Scientific Research Center (Russian Federation)
2. Russian Academy of Sciences, Institute of Problems of Chemical Physics (Russian Federation)

The crystal structure of ilyukhinite, a new mineral of the eudialyte group, is studied by X-ray diffraction. The mineral found in pegmatite bodies of the Kukisvumchorr Mountain (Khibiny alkaline complex) is characterized by low sodium content, high degree of hydration, and predominance of manganese over iron. The trigonal cell has the following parameters: a = 14.1695(6) and c = 31.026(1) Å; space group R3m. The structure is refined to final R = 0.046 in the anisotropic approximation of atomic displacements using 1527F > 3σF. The idealized formula of ilyukhinite (Z = 3) is written as (H{sub 3}O,Na){sub 14}Ca{sub 6}Mn{sub 2}Zr{sub 3}Si{sub 26}O{sub 72}(OH){sub 2} · 3H{sub 2}O. The new mineral differs from other representatives of the eudialyte group by the predominance of both oxonium in the N positions of extra-framework cations and manganese in the Ðœ2 position centering the tetragonal pyramid.

• OSTI ID: 22645263
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 1 Vol. 62; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ATOMIC DISPLACEMENTS
CATIONS
CRYSTAL STRUCTURE
IRON
MANGANESE
PEGMATITES
SILICATE MINERALS
SODIUM
SPACE GROUPS
TRIGONAL LATTICES
X-RAY DIFFRACTION